/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.heron.spouts.kafka;

import org.apache.heron.api.metric.IMetric;
import org.apache.kafka.common.Metric;

/**
 * a decorator to convert a Kafka Metric to a Heron Metric so that Kafka
 * metrics can be exposed via Heron Metrics Manager
 *
 * @param <M> the Kafka Metric type
 */
public class KafkaMetricDecorator<M extends Metric> implements IMetric<Object> {
  private M metric;

  KafkaMetricDecorator(M metric) {
    this.metric = metric;
  }

  @Override
  public Object getValueAndReset() {
    return metric.metricValue();
  }
}
